52
Check the cold soldering for
the IC501(BA5983FM)
pin 13, 14.
Replace IC501.
Check the FG1 signal line.
Check the cold soldering for
the IC401.
YES
NO
YES
A
B
NO
Check the circuit between the
IC401 Pin 3, 4
and the IC701 Pin 4.
C
Check the FAO signal.
(IC701 Pin 4 )
Does the square wave
output at the IC401 Pin 24
(FG1)?
V
1.35V
T
Check the cold soldering for the
IC301 Pin 1, 38, 40, 63 and C301,
C303 and IC701 Pin 38, 34.